Tag Archives: polar troughs

THEMIS: Polar winds streaming off the ice cap

THEMIS Image of the Day, April 5, 2018. This VIS image shows ‘streamers’ of clouds created by katabatic winds at the north polar cap. Katabatic winds are created by cold air sinking at the pole and then speeding along the … Continue reading

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THEMIS: Trough in south polar ice cap

THEMIS Image of the Day, September 22, 2016. This VIS image shows part of a depression (or trough) on the polar cap. More THEMIS Images of the Day by geological topic.

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THEMIS: Polar trough

THEMIS Image of the Day, December 5, 2014. This VIS image shows one of many troughs located on the south polar cap. More THEMIS Images of the Day by geological topic.  

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Spiral troughs in Mars polar caps are born in ‘cyclic steps’

Both Martian polar caps have deep spiral troughs that slice into them for dozens or hundreds of kilometers, but their origin and development has been much debated by scientists. New work by a team of researchers led by Isaac Smith … Continue reading

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